- 搜标题
- 搜题干
- 搜选项
单项选择题
At the 1550nm window of G.652 fiber, the dispersion coefficient D of the fiber is positive, and the group velocity of the optical carrier is proportional to the carrier frequency.
At the 1550nm window of G.652 fiber, the dispersion coefficient D of the fiber is positive, and the group velocity of the optical carrier is proportional to the carrier frequency.
A、正确
B、错误
